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E6D02 : What is cathode ray tube (CRT) persistence?

  -  The time it takes for an image to appear after the electron beam is turned on
  -  The relative brightness of the display under varying conditions of ambient light
  -  The ability of the display to remain in focus under varying conditions
  -  The length of time the image remains on the screen after the beam is turned off


Correct Answer : The length of time the image remains on the screen after the beam is turned off
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